UPON SLOWING DOWN & PULLING INTO A PARKING SPACE, TO PARK MY CAR IN FRONT OF A BUSINESS, MY VEHICLE SPONTANEOUSLY ACCELERATED FORWARD, UP OVER THE SIDEWALK. THE VEHICLE ACCELERATED A 2ND TIME AS I TRIED TO STOP THE VEHICLE WITH THE BRAKES. THE VEHICLE DID NOT STOP UNTIL IT IMPACTED THE WALL OF THE BUILDING.